What is the cheapest airline that flies from San Juan to London?

JetBlue and Iberia are the most popular carriers operating from San Juan to London

When did momondo last update prices for flights from San Juan to London?

Prices for flights from San Juan to London refresh daily.

How old do you have to be to fly from San Juan to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£156 Cheap Flights from San Juan to London in 2026

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Find the cheapest flights from San Juan to London

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

01:45 - 10:00

SJU

LGW

27h 15m

1 stop

17:00 - 10:26

LGW

SJU

46h 26m

2 stops

£415Multiple Airlines

Mon, 30 Mar - Sat, 18 Apr

21:25 - 19:00

SJU

LGW

17h 35m

1 stop

11:45 - 19:55

LGW

SJU

12h 10m

1 stop

£418Iberia

Tue, 24 Feb - Tue, 3 Mar

16:40 - 12:05

SJU

LHR

15h 25m

1 stop

11:25 - 19:55

LHR

SJU

12h 30m

1 stop

£421American Airlines

Tue, 24 Feb - Tue, 3 Mar

16:50 - 10:50

SJU

LHR

14h 00m

1 stop

06:50 - 21:22

LHR

SJU

18h 32m

2 stops

£421United Airlines

Wed, 11 Mar - Wed, 18 Mar

07:30 - 06:40

SJU

LHR

19h 10m

2 stops

06:50 - 21:22

LHR

SJU

18h 32m

2 stops

£424United Airlines

Wed, 11 Mar - Wed, 18 Mar

07:30 - 06:25

SJU

LHR

18h 55m

1 stop

06:30 - 23:58

LHR

SJU

21h 28m

2 stops

£426Delta

Tue, 24 Feb - Tue, 3 Mar

07:30 - 06:55

SJU

LHR

19h 25m

2 stops

08:40 - 23:58

LHR

SJU

19h 18m

2 stops

£429Delta

Tue, 24 Feb - Tue, 3 Mar

17:22 - 09:30

SJU

LHR

12h 08m

1 stop

12:20 - 22:51

LHR

SJU

14h 31m

1 stop

£432JetBlue

Wed, 11 Mar - Wed, 18 Mar

13:10 - 10:50

SJU

LHR

17h 40m

2 stops

07:30 - 21:22

LHR

SJU

17h 52m

2 stops

£433United Airlines

Tue, 17 Mar - Tue, 24 Mar

01:00 - 20:40

SJU

LHR

14h 40m

1 stop

07:30 - 21:24

LHR

SJU

18h 54m

2 stops

£434United Airlines

Tue, 21 Apr - Wed, 29 Apr

KLM flights from San Juan to London

Our best KLM deals on San Juan to London flight tickets

KLM

22 Apr

SJU13:25San Juan Luis Munoz Marin Intl

14h 25m

1 stop

LHR08:50London Heathrow

29 Apr

LHR13:25London Heathrow

14h 48m

1 stop

SJU23:13San Juan Luis Munoz Marin Intl

£448

KLM

31 Mar

SJU13:14San Juan Luis Munoz Marin Intl

12h 31m

1 stop

LHR06:45London Heathrow

7 Apr

LHR11:15London Heathrow

14h 03m

1 stop

SJU20:18San Juan Luis Munoz Marin Intl

£454

KLM

1 May

SJU13:25San Juan Luis Munoz Marin Intl

14h 25m

1 stop

LHR08:50London Heathrow

12 May

LHR09:20London Heathrow

18h 34m

1 stop

SJU22:54San Juan Luis Munoz Marin Intl

£484

Air Canada flights from San Juan to London

Our best Air Canada deals on San Juan to London flight tickets

Air Canada

21 Apr

SJU01:00San Juan Luis Munoz Marin Intl

26h 35m

2 stops

LHR08:35London Heathrow

29 Apr

LHR09:30London Heathrow

19h 20m

2 stops

SJU23:50San Juan Luis Munoz Marin Intl

£450

Air Canada

21 Apr

SJU01:00San Juan Luis Munoz Marin Intl

24h 30m

2 stops

LHR06:30London Heathrow

29 Apr

LHR09:30London Heathrow

19h 20m

2 stops

SJU23:50San Juan Luis Munoz Marin Intl

£452

Air Canada

26 Feb

SJU02:05San Juan Luis Munoz Marin Intl

24h 25m

2 stops

LHR06:30London Heathrow

10 Mar

LHR11:10London Heathrow

29h 07m

2 stops

SJU12:17San Juan Luis Munoz Marin Intl

£489

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Mon 30/3

01:45-10:00

1 stop27h 15m

London Gatwick

Sat 18/4

17:00-10:26

2 stops46h 26m

£415

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Tue 24/2

21:25-19:00

1 stop17h 35m

London Gatwick

Tue 3/3

11:45-19:55

1 stop12h 10m

£418

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 24/2

16:40-12:05

1 stop15h 25m

London Heathrow

Tue 3/3

11:25-19:55

1 stop12h 30m

£421

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 11/3

16:50-10:50

1 stop14h 00m

London Heathrow

Wed 18/3

06:50-21:22

2 stops18h 32m

£421

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 11/3

07:30-06:40

2 stops19h 10m

London Heathrow

Wed 18/3

06:50-21:22

2 stops18h 32m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 24/2

07:30-06:25

1 stop18h 55m

London Heathrow

Tue 3/3

06:30-23:58

2 stops21h 28m

£426

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 24/2

07:30-06:55

2 stops19h 25m

London Heathrow

Tue 3/3

08:40-23:58

2 stops19h 18m

£429

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 11/3

17:22-09:30

1 stop12h 08m

London Heathrow

Wed 18/3

12:20-22:51

1 stop14h 31m

£432

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 17/3

13:10-10:50

2 stops17h 40m

London Heathrow

Tue 24/3

07:30-21:22

2 stops17h 52m

£433

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 21/4

01:00-20:40

1 stop14h 40m

London Heathrow

Wed 29/4

07:30-21:24

2 stops18h 54m

£434

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in February. Flight prices, which tend to average around £427, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from San Juan averaging around £458.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £610 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £517 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Fastest flight time	12h 25m
Direct flights	None

The fastest flight from San Juan to London takes 12h 25m

There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.

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How far is San Juan to London by plane?
San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 12h 25m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San Juan to London?
Prices for flights from San Juan to London refresh daily.
How old do you have to be to fly from San Juan to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Eastbourne

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Southend-on-Sea

Canterbury

Ipswich

Ilford

Guildford

Chelmsford

Hayes

Dover

Folkestone

Worthing

Colchester

Bedford

Ramsgate

Chichester

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.